package com.mysiteforme.admin.base.util;

import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
 
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
 
/**
 * 
 * @author Muzzy Xu.
 *
 */
public class AesUtil {
	public static final String VIPARA = "3062470043420212";
	public static final String KEY = "SSED0755SSED2214";
	public static final String bm = "utf-8";
 
 
 
	/**
	 * 字节数组转化为大写16进制字符串
	 * 
	 * @param b
	 * @return
	 */
	private static String byte2HexStr(byte[] b) {
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < b.length; i++) {
			String s = Integer.toHexString(b[i] & 0xFF);
			if (s.length() == 1) {
				sb.append("0");
			}
 
			sb.append(s.toUpperCase());
		}
 
		return sb.toString();
	}
 
	/**
	 * 16进制字符串转字节数组
	 * 
	 * @param s
	 * @return
	 */
	private static byte[] str2ByteArray(String s) {
		int byteArrayLength = s.length() / 2;
		byte[] b = new byte[byteArrayLength];
		for (int i = 0; i < byteArrayLength; i++) {
			byte b0 = (byte) Integer.valueOf(s.substring(i * 2, i * 2 + 2), 16)
					.intValue();
			b[i] = b0;
		}
 
		return b;
	}
 
 
	/**
	 * AES 加密
	 * 
	 * @param content
	 *            明文
	 * @return
	 */
 
	public static String aesEncrypt(String content) {
		try {
			IvParameterSpec zeroIv = new IvParameterSpec(VIPARA.getBytes());
			SecretKeySpec key = new SecretKeySpec(KEY.getBytes(), "AES");
			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
			cipher.init(Cipher.ENCRYPT_MODE, key, zeroIv);
			byte[] encryptedData = cipher.doFinal(content.getBytes(bm));
			return byte2HexStr(encryptedData);
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (InvalidKeyException e) {
			e.printStackTrace();
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
		} catch (BadPaddingException e) {
			e.printStackTrace();
		} catch (InvalidAlgorithmParameterException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
 
		return null;
	}
 
	/**
	 * AES 解密
	 * 
	 * @param content
	 *            密文
	 * @return
	 */
 
	public static String aesDecrypt(String content) {
		try {
			byte[] byteMi=	str2ByteArray(content);
			IvParameterSpec zeroIv = new IvParameterSpec(VIPARA.getBytes());
			SecretKeySpec key = new SecretKeySpec(KEY.getBytes(), "AES");
			Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
			cipher.init(Cipher.DECRYPT_MODE, key, zeroIv);
			byte[] decryptedData = cipher.doFinal(byteMi);
			return new String(decryptedData, "utf-8");
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		} catch (NoSuchPaddingException e) {
			e.printStackTrace();
		} catch (InvalidKeyException e) {
			e.printStackTrace();
		} catch (IllegalBlockSizeException e) {
			e.printStackTrace();
		} catch (BadPaddingException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (InvalidAlgorithmParameterException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return null;
	}
	
	/**
	 * 测试
	 */
//	public static void main(String[] args) {
//		String s = aesEncrypt("admin");
//		System.out.println("加密后："+s);
//		String d = aesDecrypt(s);
//		System.out.println("解密后："+d);
//	}

 
}
